Hello,
I have the following settings in the Sierra circuit tool.
Ambient temperature = 40 degC
Temperature rise = 20 degC
Conductor width = 80 mil
Trace = External
I have changed the conductor thickness from 0.5 oz to 2 oz.
The maximum current capacity increases from 3.1 A to 6.2 A.
The resistance at ambient decreases from 25.7 mOhm to 6.4 mOhm.
The resistance at high temperature also decreases from 27.6 mOhm to 6.7 mOhm.
All make sense but no changes in power loss at max temperature ?
You increased current while decreasing resistance…so I would expect the power loss to be the same.
If you had the same current while decreasing resistance, then the power loss would be less.
Power Loss at Max Temperature is dependent on the Max current capacity and the Resistance at Max Temperature. As the Trace thickness increases, Current capacity increases and the Resistance decreases. but it does not affect the Power Loss as the increase and decrease in current capacity and resistance is proportional.
